A.4.0~5.0 B.5.0~6.0 C.5.0~7.5 D.7.0~8.5
A.0.1mS/m B.0.01mS/m C.0.05mS/m D.0.5mS/m
A.顆粒物質(zhì) B.微生物 C.電導率 D.膠體離子